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NAND Driver Support Atomic Sector Write Question

Dennis Nguyen
Expert 1690 points
Other Parts Discussed in Thread: AM3517, AM3505

Hi,

I am using BSP_WINCE_ARM_A8_01_02_00 with AM3505/AM3517. I am using the same NAND chip with LogicPD AM3517 EVM. The NAND chip is Micron MT29F4G16 and it works as expected.  I am planning to use WinCE transaction-safe extended FAT (TexFAT) file system which requires atomic sector write operations.

I browsed through the BSP source code and looked for the codes for where the flash driver support the atomic sector write operations. Look like when g_bUseFlashIOCTLs is true the driver will set RequestFlags = FLASH_SECTOR_REQUEST_FLAG_WRITE_THROUGH ||FLASH_SECTOR_REQUEST_FLAG_ATOMIC.  However, I don't see g_bUseFlashIOCTLs  ever set.

My questions are:

1. Where is a good place to set g_bUseFlashIOCTLs?

2. Is it safe to use?

3. Will it satisfy TexFAT?

Thanks,

Dennis

 

Thanks,

Dennis Nguyen

  • 0
    Expert 1690 points

    Please disregard the g_bUseFlashIOCTLs comment. This code section is for the test code only. If I read the BSP code correctly, the NAND driver should support atomic sector write operations due to FMD_WriteSector() indicates direct memory write to NAND and “NonatomicSector” registry is not used in BSP. If you have any comment on TexFAT, please response.

    Thanks,

    Dennis